【摘要】：能源和淡水資源是人類社會生存和發(fā)展的物質基礎,當前,世界各國普遍以煤炭、石油、天然氣為傳統(tǒng)能源。隨著傳統(tǒng)能源的短缺、淡水資源缺乏和傳統(tǒng)能源造成的環(huán)境污染日益嚴重,世界各國把發(fā)展重心轉向可再生能源的開發(fā)和利用。綜合考慮太陽能的優(yōu)點和抽水蓄能電站的特點提出一種新的技術：太陽能輔助抽水蓄能發(fā)電技術。首先,對提出太陽能輔助抽水蓄能發(fā)電技術的原因和必要性進行了分析,并對太陽能輔助抽水蓄能發(fā)電技術的原理和各種技術的支持進行了系統(tǒng)的分析與研究,對此技術中的太陽能集熱器、蒸汽上升系統(tǒng)、換熱系統(tǒng)和冷凝系統(tǒng)進行了簡單的設計與計算分析。然后,采用FLUENT軟件對太陽能輔助抽水發(fā)電技術中的關鍵子系統(tǒng)蒸汽上升管系統(tǒng)進行數(shù)值模擬,得到了蒸汽上升管內部溫度場、壓力場和速度場。研究了蒸汽上升管不同的結構參數(shù)對管內蒸汽流速和管內抽力的影響,從模擬結果中得出結論：上升管高度越高,管內的抽力越大,流速越快。高度一定時,半徑越大,管內的抽力越小,流速越小。最后,研究了太陽能輔助抽水蓄能發(fā)電技術應用于海水淡化和水電聯(lián)產(chǎn)的運行方式。從經(jīng)濟上分析太陽能輔助抽水蓄能發(fā)電技術的可行性,采取投資回收年限對此技術進行研究。太陽能輔助抽水蓄能發(fā)電技術只考慮發(fā)電價值和投資的情況下,其投資回報年限為20年,考慮海水淡化和環(huán)境的價值后,此技術的投資回收年限為8.2年。對此技術的回收年限和能源平均成本影響最大的因素太陽能集熱價格進行了研究分析。再綜合考慮系統(tǒng)的社會價值和電網(wǎng)價值,從而證明此技術是可行的,具有一定的研究價值和推廣價值。
[Abstract]:Energy and fresh water resources are the material basis for the survival and development of human society. At present, coal, oil and natural gas are widely used as traditional energy in the world. With the shortage of traditional energy, the shortage of fresh water resources and the increasingly serious environmental pollution caused by traditional energy, countries all over the world turn to the development and utilization of renewable energy. Considering the advantages of solar energy and the characteristics of pumped storage power station, a new technology, solar assisted pumped storage power generation technology, is proposed. Firstly, the reasons and necessity of solar assisted pumped storage power generation technology are analyzed, and the principle of solar assisted pumped storage power generation technology and the support of various technologies are systematically analyzed and studied. The solar collector, steam rising system, heat transfer system and condensing system are simply designed and calculated. Then, FLUENT software is used to simulate the steam riser system, which is a key subsystem in the solar assisted pumping technology. The temperature field, pressure field and velocity field in the steam riser are obtained. The influence of different structural parameters of steam riser on the steam velocity and pumping force in the pipe is studied. It is concluded from the simulation results that the higher the height of the riser tube, the greater the suction force in the pipe and the faster the velocity of flow. When the height is constant, the larger the radius, the smaller the pumping force and velocity. Finally, the application of solar-assisted pumped storage power generation technology to seawater desalination and hydropower co-generation is studied. The feasibility of solar assisted pumped storage power generation technology is analyzed economically, and the investment recovery years are adopted to study the technology. The investment return life of solar assisted pumped storage power generation technology is 20 years when the value and investment of power generation are only considered. After considering the value of seawater desalination and environmental value, the investment recovery life of this technology is 8.2 years. The factors that have the greatest influence on the recovery life and average energy cost of this technology are studied and analyzed in this paper. Considering the social value of the system and the value of the power grid, it is proved that the technology is feasible and has certain research value and popularization value.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV743;TK519
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本文編號：2244490